49ers pick up 5th-year option on DE Arik Armstead
Was Arik Armstead's move 'biggest turnaround' for 49ers' defense? – NBC Sports Bay Area & California
Can 49ers break through championship window before it closes? - ABC7 San Francisco
49ers 90-in-90: Will Arik Armstead surpass five sacks this season? - Niners Nation
A look at which 49ers veterans could be on the chopping block if the roster overhaul continues - The Athletic
Arik Armstead is finally having his moment – KNBR
Fred Warner, 49ers come to terms on five-year extension that is worth up to $95 million, per report
49ers' 2019 'Who Is?' series: Defensive tackle Arik Armstead
49ers keep Armstead, reportedly trade Buckner to Colts